Endless conveyer made of perforated metal.



W. W. SIBSON & B. A. PARKBS.

ENDLESS UONVEYER MADE OF PERFORATED METAL.

APPLICATION FILED SEPT. 14, 1911.

1 1 269.. Patented Aug. 26, 1913.

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UNIT D STATES PATENT OFFICE.

WALTER W. SIBSON, 0F PHILADELPHIA, AND BERTRAND A. PARKES, 0F BARONHILL,

PENNSYLVANIA, ASSIGNORS TO THE PHILADELPHIA DRYING MACHINERY COM- PANY,OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

ENDLESS CONVEYER MADE OF PERFORATED METAL.

. Specification of Letters Patent.

Patented Aug. 26,1913.

To all whom it may concern Be it known that we, WALTER W. SIBsoN, ofPhiladelphia, in the county of Philadelphia and State of Pennsylvaniaand BER- TRAND A. PAnKEs', of Baron I-Iill, in the county of Montgomeryand State of Pennsylvania, have invented certain new and usefulImprovements in Endless Conveyers Made of Perforated Metal, whereof thefollowing is a specification, reference being had to the accompanyingdrawings.

Our invention relates to an endless traveling apron or conveyer, havinga perforated carrying surface, as for instance, of woven wire mesh, asshown. Instead of making such an apron continuous, which involves wellknown difliculties, we mount a sectional apron on side chains and makeeach section co-extensive with one link of the chams. Such aprons arefrequently made of large size, and pass around large drums, at theextremities of their travel, in which case it is feasible to use links10 or 12 inches long, or even more. According to our invention, thepaired links are united by cross pieces making rectangular frames byeach of which is supported a separate section of the conveyer, thussecuring complete freedom of motion as between successive sections.

In the accompanying drawings, Figure I, is a plan view showing a part ofone side of an endless conveyer, embodying our invention, suflicientbeing shown to explain the construction of the whole. Fig. II, is a sideelevation of the same. Fig. III, is a central section of the same, onthe line III, III, of Fig. I. Fig. IV, is a detail view.

As in Fig. I, only one-half or less of the conveyer is shown, it will beunderstood that what is there shown must be re-duplicated in order tocomplete the full width of the conveyer. The carrying chains, of whichthere are two, one on either side, consist of successive links 1, 1,whichvare hinged to gether by pivots 2, as shown. Each link is providednear its ends with bosses or projections 3, slotted to receivecross-pieces 4, which pass from one link on one side to its fellow onthe other side, and which are similarly seated at both ends.Eachcross-piece 4, is preferably in the form of an angle iron, and inorder that the slot in the boss may receive it, it is made of similarangular shape. If desirod,'the cross-piece may be permanently attachedto the links of the chain making a solid frame, but I prefer forpurposes of assemblage and replacement of parts, to construct the pieceswhich have been described, separately, in which case, each cross-pieceafter being received within the slot, of the projection 3, is heldtherein by a cotter pin 6. Two links thus united by two crosspieccs forma rectangular frame, and there is thus provided a separate frame, thesides of which are formed by each pair of links. As shown eachcrosspiece is centrally hinged to the cross'piece of the next succeedingsection, by a hinge 7, but other flexible connections may be employed.Exce t where the linked sections are short, we urther support the metalsurface of the conveyer by side lugs 10, projecting from each link andserving also for purposes of attachment.

Corresponding to each rectangular frame thus constituted, is a sectionof wire netting 11, in length corresponding to the distance between thepivots at the ends of the links. This section of wire netting 11, isconveniently fastened at either end to the cross piece 4, as forinstance, by turning it over the end and under the edge of the crosspiece as seen in Fig. IV, but it may be otherwise attached. There is nomovement between the section of wire netting and any of the pieces towhich it is attached. It will therefore be understood that'the entireconveyer consists of a series of links connected at or near their endsby cross-pieces so that each pair of links with its cross-pieces,constitutes a supporting framework, on which is mounted a correspondingsection of wire mesh or other material of which the body of the conveyeris composed. The mesh is positively attached to the lugs 10, by means ofthe rivet or bolt 15, and may be similarly' attached to the cross-pieceif desired.

It will be noticed that the sheet of wire mesh is so mounted inrelationto the links as to bring the end of the sheet where it' abutsagainst the end of the next succeeding sheet as near as possible in linewith the axes of the pivots by which the links are hinged together. Thisis clearly illustrated in Flg. III. As a result of this, as the conveyerpasses around the drums and other claim:

1. A sectional conveyer of perforated material comprising endless chainswith paired links; pivoted connections for successive links;cross-pieces uniting corresponding links, one near each end of each pairof links; and sections of perforated metal surface mounted one upon eachrectangular frame, formed by each pair of links, with its two connectingcross-pieces, said sections being attached to the two cross pieces oftheframe.

2. In a sectional apron, the combination of paired links hinged topaired links at their extremities; projections near each end of eachlink with carrying slots; cross-pieces running from link to its fellowseparately mounted in the carrying slots; and a section of apron surfacecorresponding in length to the links and carried between the crosspieces.

3. A sectional apron consisting of carrying chains having paired links;cross pieces uniting each link with its fellow near the ends in the formof a rectangular frame; a section of apron surface mounted within saidframe; and supporting lugs projecting in from the sides of the linksupon which the surface is additionally supported.

4. A sectional wire mesh apron, comprising supporting chains havinghinged links; cross-pieces removably mounted between each linkand itsfellow, near each extremity thereof, whereby each pair of links and thetwo uniting cross-pieces form a rectangular supporting frame;'a sectionof wire mesh supported in said frame and attached to the cross pieces;and a flexible connection between each cross piece and that of the nextadjoining frame.

In testimony whereof we have hereunto signed our names at Philadelphia,Pennsylvania, this eleventh day of September, 1911.

\VALTER W. SIBSON. BERTRAND A. PARKES.

Witnesses:

L. R. GARRETSON, RALPH M. ERW'IN.

